1. Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
2. Department of Assisted Reproduction, Shanghai Ninth People’s Hospital, Jiao Tong University School of Medicine, Shanghai, China
3. School of Public Health, Key Lab of Public Health Safety of the Ministry of Education, NHC Key Laboratory of Health Technology Assessment, Fudan University, Shanghai, China